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United States Patent | 5,206,860 |
Brown ,   et al. | April 27, 1993 |
A connection recovery apparatus for placing a dynamic connection of a dynamic switch of a computer I/O system in a known state upon the detection of a possible switching error. The I/O system includes transmitting stations each having a link-level facility attached by a link to a dynamic-switch port of a dynamic-switch. The dynamic-switch makes dynamic connections between any two of the stations. Upon the detection of a possible switching error, the detecting link-level facility of a station or its attached dynamic-switch port starts a switch recovery procedure which places any dynamic connection to that station in a known disconnected state.
Inventors: | Brown; Paul J. (Poughkeepsie, NY); Kalos; Matthew J. (Tucson, AZ); Sachs; Martin W. (Westport, CT) |
Assignee: | International Business Machines Corporation (Armonk, NY) |
Appl. No.: | 576302 |
Filed: | August 31, 1990 |
Current U.S. Class: | 714/712; 714/5; 714/713 |
Intern'l Class: | G06F 011/00 |
Field of Search: | 371/20.1,7,11.2 395/575 |
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4605928 | Aug., 1986 | Georgiou | 340/825. |
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4648031 | Mar., 1987 | Jenner | 364/200. |
4665520 | May., 1987 | Strom et al. | 371/7. |
5081624 | Jan., 1992 | Beukema | 371/8. |
Foreign Patent Documents | |||
2194867 | Mar., 1988 | GB. |
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